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Finding the Fourth Proportional to 760.99, 1,136.54 and 718.87

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Solution

The fourth proportional to 760.99, 1,136.54 and 718.87 is: 1,073.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    760.99 : 1,136.54 = 718.87 : x
  2. Step 2: Convert to fraction form
    760.99/1,136.54 = 718.87/x
  3. Step 3: Cross multiply
    760.99x = 1,136.54 × 718.87
  4. Step 4: Simplify right side
    760.99x = 817,024.51
  5. Step 5: Solve for x
    x = 817,024.51/760.99
  6. Step 6: Final answer
    x = 1,073.63

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.